UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C.  20549
FORM 10-Q
(Mark One)
QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
For the quarterly period ended June 30, 2020 2021
or
TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
For the transition period from to
Commission File Number: 001-03140
Northern States Power Company
(Exact name of registrant as specified in its charter)
Wisconsin001-0314039-0508315
(State or other jurisdiction orof incorporation or organization)(Commission File Number)(IRSI.R.S Employer Identification No.)
1414 West Hamilton AvenueEau ClaireWisconsin54701
(Address of Principal Executive Offices)principal executive offices)(Zip Code)
715(715)839-2625737-2625
(Registrant’s Telephone Number, Including Area Code)telephone number, including area code)
N/A
(Former Name, Former Addressname, former address and Former Fiscal Year,former fiscal year, if Changed Since Last Report)changed since last report)

Securities registered pursuant to Section 12(b) of the Act:
Title of each classTrading SymbolSymbol(s)Name of each exchange on which registered
N/AN/AN/A

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.  Yes   No
Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files).  Yes   No
Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and “emerging growth company” in Rule 12b-2 of the Exchange Act.
Large accelerated filerAccelerated filer
Non-accelerated filerSmaller reporting company
Emerging growth company
If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.
Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act). Yes No
Indicate the number of shares outstanding of each of the issuer’s classes of common stock, as of the latest practicable date.
ClassOutstanding at July 31, 202029, 2021
Common Stock, $100 par value933,000 shares
Northern States Power Company meets the conditions set forth in General Instructions H(1)(a) and (b) of Form 10-Q and is therefore filing this Form 10-Q with the reduced disclosure format specified in General Instruction H(2) to such Form 10-Q.



TABLE OF CONTENTS
PART IFINANCIAL INFORMATION
Item 1 —
Item 2 —
Item 4 —
   
PART IIOTHER INFORMATION 
Item 1 —
Item 1A —
Item 6 —
   
Certifications Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002
Certifications Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002
This Form 10-Q is filed by NSP-Wisconsin.Northern States Power Company, a Wisconsin corporation (NSP-Wisconsin). NSP-Wisconsin is a wholly owned subsidiary of Xcel Energy Inc. Additional information on Xcel Energy is available on various filings with the SEC.Securities and Exchange Commission. This report should be read in its entirety.



Definitions of Abbreviations
Xcel Energy Inc.’s Subsidiaries and Affiliates (current and former)
e primee prime inc.
NSP-MinnesotaNorthern States Power Company, a Minnesota corporation
NSP-WisconsinNorthern States Power Company, a Wisconsin corporation
PSCoPublic Service Company of Colorado
SPSSouthwestern Public Service Company
Utility subsidiariesNSP-Minnesota, NSP-Wisconsin, PSCo and SPS
Xcel EnergyXcel Energy Inc. and its subsidiaries
Federal and State Regulatory Agencies
D.C. CircuitUnited States Court of Appeals for the District of Columbia Circuit
EPAUnited States Environmental Protection Agency
FERCFederal Energy Regulatory Commission
IRSInternal Revenue Service
PSCWPublic Service Commission of Wisconsin
SECSecurities and Exchange Commission
Other
ADITAccumulated deferred income tax
ASCFASB Accounting Standards Codification
C&ICommercial and Industrial
CEOChief executive officer
CFOChief financial officer
COVID-19Novel coronavirus
ETREffective tax rate
FASBFinancial Accounting Standards Board
GAAPGenerallyUnited States generally accepted accounting principles
MDLMulti-district litigation
MGPManufactured gas plant
MISOMidcontinent Independent System Operator, Inc.
NOLNet operating loss
O&MOperating and maintenance
PFASPer- and PolyFluoroAlkyl Substances
ROEReturn on equity
RTORegional Transmission Organization
TOsTransmission owners
UMPUtility Money Pool
Forward-Looking Statements
Except for the historical statements contained in this report, the matters discussed herein are forward-looking statements that are subject to certain risks, uncertainties and assumptions. Such forward-looking statements, including those relating to future sales, future expenses, future operating performance, estimated base capital expenditures and financing plans, projected capital additions and forecasted annual revenue requirements with respect to rider filings, expected rate increases to customers, expectations and intentions regarding regulatory proceedings, and expected impacts on our results of operations, financial condition and cash flows or resettlement calculations and credit losses relating to certain energy transactions, as well as assumptions and other statements are intended to be identified in this document by the words “anticipate,” “believe,” “could,” “estimate,” “expect,” “intend,” “may,” “objective,” “outlook,” “plan,” “project,” “possible,” “potential,” “should,” “will,” “would” and similar expressions. Actual results may vary materially. Forward-looking statements speak only as of the date they are made, and we expressly disclaim any obligation to update any forward-looking information. The following factors, in addition to those discussed elsewhere in this Quarterly Report on Form 10-Q and in other securities filings with the SEC (including NSP-Wisconsin's Annual Report on Form 10-K for the fiscal year ended Dec. 31, 2019,2020, and subsequent securities filings), could cause actual results to differ materially from management expectations as suggested by such forward-looking information: uncertainty around the impacts and duration of the COVID-19 pandemic; operational safety, including nuclear generation;safety; successful long-term operational planning; commodity risks associated with energy markets and production; rising energy prices and fuel costs; qualified employee work force and third-party contractor factors; ability to recover costs,costs; changes in regulation; reductions in our credit ratings and the cost of maintaining certain contractual relationships; general economic conditions, including inflation rates, monetary fluctuations and their impact on capital expenditures and the ability of NSP-Wisconsin and its subsidiaries to obtain financing on favorable terms; availability or cost of capital; our customers’ and counterparties’ ability to pay their debts to us; assumptions and costs relating to funding our employee benefit plans and health care benefits; tax laws; effects of geopolitical events, including war and acts of terrorism; cyber security threats and data security breaches; seasonal weather patterns; changes in environmental laws and regulations; climate change and other weather; natural disaster and resource depletion, including compliance with any accompanying legislative and regulatory changes; and costs of potential regulatory penalties.


Table of Contents

PART I — FINANCIAL INFORMATION
ITEM 1 — FINANCIAL STATEMENTS
NSP-WISCONSIN AND SUBSIDIARIES
CONSOLIDATED STATEMENTS OF INCOME (UNAUDITED)
(amounts in millions)
Three Months Ended June 30Six Months Ended June 30 Three Months Ended June 30Six Months Ended June 30
2020201920202019 2021202020212020
Operating revenuesOperating revenues  Operating revenues  
Electric, non-affiliatesElectric, non-affiliates$157.8  $164.4  $328.7  $335.3  Electric, non-affiliates$178 $158 $356 $329 
Electric, affiliatesElectric, affiliates41.5  43.5  82.4  87.6  Electric, affiliates46 41 92 82 
Natural gasNatural gas19.0  20.9  64.2  82.0  Natural gas31 19 88 64 
Other0.2  0.1  0.2  0.2  
Total operating revenuesTotal operating revenues218.5  228.9  475.5  505.1  Total operating revenues255 218 536 475 
Operating expensesOperating expenses  Operating expenses 
Electric fuel and purchased power, non-affiliatesElectric fuel and purchased power, non-affiliates3.4  3.1  6.3  5.0  Electric fuel and purchased power, non-affiliates10 
Purchased power, affiliatesPurchased power, affiliates91.3  99.9  185.6  203.4  Purchased power, affiliates106 91 206 186 
Cost of natural gas sold and transportedCost of natural gas sold and transported6.6  8.2  28.0  40.5  Cost of natural gas sold and transported20 51 28 
Operating and maintenance expensesOperating and maintenance expenses44.9  51.3  93.5  103.2  Operating and maintenance expenses50 45 99 94 
Conservation program expensesConservation program expenses3.2  3.1  6.3  6.0  Conservation program expenses
Depreciation and amortizationDepreciation and amortization38.8  34.4  77.4  68.5  Depreciation and amortization36 39 73 77 
Taxes (other than income taxes)Taxes (other than income taxes)7.1  7.1  14.1  14.7  Taxes (other than income taxes)15 14 
Total operating expensesTotal operating expenses195.3  207.1  411.2  441.3  Total operating expenses228 195 460 411 
Operating incomeOperating income23.2  21.8  64.3  63.8  Operating income27 23 76 64 
Other expense, netOther expense, net(1.8) (0.3) (4.3) (0.6) Other expense, net(2)(4)
Allowance for funds used during construction — equityAllowance for funds used during construction — equity1.4  0.9  2.5  1.4  Allowance for funds used during construction — equity
Interest charges and financing costsInterest charges and financing costs  Interest charges and financing costs
Interest charges — includes other financing costs of $0.4, $0.3, $0.7 and $0.7, respectively9.9  9.8  19.8  19.8  
Interest chargesInterest charges12 10 21 20 
Allowance for funds used during construction — debtAllowance for funds used during construction — debt(0.5) (0.3) (1.0) (0.6) Allowance for funds used during construction — debt(1)(1)(1)(1)
Total interest charges and financing costsTotal interest charges and financing costs9.4  9.5  18.8  19.2  Total interest charges and financing costs11 20 19 
Income before income taxesIncome before income taxes13.4  12.9  43.7  45.4  Income before income taxes17 13 58 44 
Income tax expense (benefit)Income tax expense (benefit)1.3  4.3  (2.0) 12.8  Income tax expense (benefit)12 (2)
Net incomeNet income$12.1  $8.6  $45.7  $32.6  Net income$14 $12 $46 $46 

See Notes to Consolidated Financial Statements

4

Table of Contents

NSP-WISCONSIN AND SUBSIDIARIES
CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED)
(amounts in millions)
Six Months Ended June 30 Six Months Ended June 30
20202019 20212020
Operating activitiesOperating activities  Operating activities  
Net incomeNet income$45.7  $32.6  Net income$46 $46 
Adjustments to reconcile net income to cash provided by operating activities:Adjustments to reconcile net income to cash provided by operating activities:Adjustments to reconcile net income to cash provided by operating activities:
Depreciation and amortizationDepreciation and amortization78.0  68.9  Depreciation and amortization73 78 
Deferred income taxesDeferred income taxes(15.2) 2.0  Deferred income taxes10 (15)
Allowance for equity funds used during constructionAllowance for equity funds used during construction(2.5) (1.4) Allowance for equity funds used during construction(2)(3)
Provision for bad debtsProvision for bad debts2.83.5Provision for bad debts
Changes in operating assets and liabilities:Changes in operating assets and liabilities:Changes in operating assets and liabilities:
Accounts receivableAccounts receivable(4.2) 6.8  Accounts receivable10 (4)
Accrued unbilled revenuesAccrued unbilled revenues10.4  11.5  Accrued unbilled revenues10 
InventoriesInventories0.2  0.7  Inventories(1)
Other current assetsOther current assets(0.3) (0.4) Other current assets(6)
Accounts payableAccounts payable(3.0) (8.9) Accounts payable(3)
Net regulatory assets and liabilitiesNet regulatory assets and liabilities5.3  2.5  Net regulatory assets and liabilities(47)
Other current liabilitiesOther current liabilities(1.9) 3.6  Other current liabilities(2)(2)
Pension and other employee benefit obligationsPension and other employee benefit obligations(6.9) (7.1) Pension and other employee benefit obligations(5)(7)
Other, netOther, net0.2  1.0  Other, net
Net cash provided by operating activitiesNet cash provided by operating activities108.6  115.3  Net cash provided by operating activities94 108 
Investing activitiesInvesting activities  Investing activities
Utility capital/construction expenditures(121.0) (86.8) 
Capital/construction expendituresCapital/construction expenditures(111)(121)
Net cash used in investing activitiesNet cash used in investing activities(121.0) (86.8) Net cash used in investing activities(111)(121)
Financing activitiesFinancing activities  Financing activities
Repayments of short-term borrowings, netRepayments of short-term borrowings, net(65.0) (1.0) Repayments of short-term borrowings, net(19)(65)
Proceeds from (repayments of) long-term debt97.6  (0.1) 
Borrowings under utility money pool arrangementBorrowings under utility money pool arrangement186 
Repayments under utility money pool arrangementRepayments under utility money pool arrangement(153)
Proceeds from long-term debtProceeds from long-term debt98 
Capital contributions from parentCapital contributions from parent37.0  14.8  Capital contributions from parent40 37 
Dividends paid to parentDividends paid to parent(31.6) (41.7) Dividends paid to parent(38)(32)
Other, netOther, net(0.2) —  Other, net
Net cash provided by (used in) financing activities37.8  (28.0) 
Net cash provided by financing activitiesNet cash provided by financing activities17 38 
Net change in cash, cash equivalents and restricted cashNet change in cash, cash equivalents and restricted cash25.4  0.5  Net change in cash, cash equivalents and restricted cash25 
Cash, cash equivalents and restricted cash at beginning of periodCash, cash equivalents and restricted cash at beginning of period1.3  2.2  Cash, cash equivalents and restricted cash at beginning of period
Cash, cash equivalents and restricted cash at end of periodCash, cash equivalents and restricted cash at end of period$26.7  $2.7  Cash, cash equivalents and restricted cash at end of period$$26 
Supplemental disclosure of cash flow information:Supplemental disclosure of cash flow information:  Supplemental disclosure of cash flow information:
Cash paid for interest (net of amounts capitalized)Cash paid for interest (net of amounts capitalized)$(17.9) $(18.2) Cash paid for interest (net of amounts capitalized)$(19)$(18)
Cash paid for income taxes, netCash paid for income taxes, net(13.1) (3.9) Cash paid for income taxes, net(13)(13)
Supplemental disclosure of non-cash investing transactions:  
Supplemental disclosure of non-cash investing and financing transactions:Supplemental disclosure of non-cash investing and financing transactions:
Accrued property, plant and equipment additionsAccrued property, plant and equipment additions$18.5  $11.5  Accrued property, plant and equipment additions$19 $18 
Inventory transfers to property, plant and equipment Inventory transfers to property, plant and equipment2.3  2.4  Inventory transfers to property, plant and equipment
Allowance for equity funds used during construction Allowance for equity funds used during construction2.5  1.4  Allowance for equity funds used during construction23

See Notes to Consolidated Financial Statements
5

Table of Contents

NSP-WISCONSIN AND SUBSIDIARIES
CONSOLIDATED BALANCE SHEETS (UNAUDITED)
(amounts in millions, except share and per share data)
June 30, 2020Dec. 31, 2019 June 30, 2021Dec. 31, 2020
AssetsAssets  Assets  
Current assetsCurrent assets  Current assets  
Cash and cash equivalentsCash and cash equivalents$26.7  $1.3  Cash and cash equivalents$$
Accounts receivable, netAccounts receivable, net63.4  59.2  Accounts receivable, net61 70 
Accrued unbilled revenuesAccrued unbilled revenues42.5  53.1  Accrued unbilled revenues48 53 
Other ReceivablesOther Receivables
InventoriesInventories13.4  16.0  Inventories15 15 
Regulatory assetsRegulatory assets45.9  71.9  Regulatory assets47 19 
Prepaid taxesPrepaid taxes23.2  23.0  Prepaid taxes30 24 
Prepayments and otherPrepayments and other4.9  4.6  Prepayments and other
Total current assetsTotal current assets220.0  229.1  Total current assets210 191 
Property, plant and equipment, netProperty, plant and equipment, net2,416.8  2,359.4  Property, plant and equipment, net2,541 2,484 
Other assetsOther assets  Other assets
Regulatory assetsRegulatory assets218.0  224.4  Regulatory assets216 215 
Other InvestmentsOther Investments
OtherOther3.5  3.1  Other
Total other assetsTotal other assets221.5  227.5  Total other assets221 219 
Total assetsTotal assets$2,858.3  $2,816.0  Total assets$2,972 $2,894 
Liabilities and EquityLiabilities and Equity  Liabilities and Equity
Current liabilitiesCurrent liabilities  Current liabilities
Current portion of long-term debtCurrent portion of long-term debt$19 $19 
Short-term debtShort-term debt$—  $65.0  Short-term debt19 
Borrowings under utility money pool arrangementBorrowings under utility money pool arrangement33 
Accounts payableAccounts payable37.1  53.6  Accounts payable47 41 
Accounts payable to affiliatesAccounts payable to affiliates21.4  19.0  Accounts payable to affiliates29 15 
Dividends payable to parentDividends payable to parent20.2  14.7  Dividends payable to parent15 19 
Regulatory liabilitiesRegulatory liabilities63.9  78.9  Regulatory liabilities31 
Taxes accruedTaxes accrued7.7  6.8  Taxes accrued12 
Environmental liabilitiesEnvironmental liabilities4.5  5.7  Environmental liabilities
Accrued interestAccrued interest9.5  9.3  Accrued interest10 10 
OtherOther15.9  20.7  Other17 15 
Total current liabilitiesTotal current liabilities180.2  273.7  Total current liabilities189 185 
Deferred credits and other liabilitiesDeferred credits and other liabilities  Deferred credits and other liabilities
Deferred income taxesDeferred income taxes302.9  298.1  Deferred income taxes321 307 
Deferred investment tax creditsDeferred investment tax credits6.2  6.5  Deferred investment tax credits
Regulatory liabilitiesRegulatory liabilities360.6  370.8  Regulatory liabilities369 350 
Environmental liabilitiesEnvironmental liabilities17.0  17.8  Environmental liabilities15 16 
Customer advancesCustomer advances19.5  18.5  Customer advances21 20 
Pension and employee benefit obligationsPension and employee benefit obligations26.6  33.4  Pension and employee benefit obligations23 28 
OtherOther23.8  22.6  Other27 33 
Total deferred credits and other liabilitiesTotal deferred credits and other liabilities756.6  767.7  Total deferred credits and other liabilities782 754 
Commitments and contingenciesCommitments and contingenciesCommitments and contingencies00
CapitalizationCapitalization  Capitalization
Long-term debtLong-term debt906.0  808.0  Long-term debt888 887 
Common stock — 1,000,000 shares authorized of $100 par value; 933,000 shares
outstanding at June 30, 2020 and Dec. 31, 2019, respectively
93.3  93.3  
Common stock — 1,000,000 shares authorized of $100 par value; 933,000 shares
outstanding at June 30, 2021 and Dec. 31, 2020, respectively
Common stock — 1,000,000 shares authorized of $100 par value; 933,000 shares
outstanding at June 30, 2021 and Dec. 31, 2020, respectively
93 93 
Additional paid in capitalAdditional paid in capital577.7  537.3  Additional paid in capital638 605 
Retained earningsRetained earnings344.5  336.0  Retained earnings382 370 
Total common stockholder’s equity1,015.5  966.6  
Total common stockholder's equityTotal common stockholder's equity1,113 1,068 
Total liabilities and equityTotal liabilities and equity$2,858.3  $2,816.0  Total liabilities and equity$2,972 $2,894 

See Notes to Consolidated Financial Statements
6

Table of Contents

NSP-WISCONSIN AND SUBSIDIARIES
CONSOLIDATED STATEMENTS OF COMMON STOCKHOLDER'S EQUITY (UNAUDITED)
(amounts in millions, except share data; shares in thousands)
Common Stock IssuedRetained EarningsTotal
Common
Stockholder's
Equity
Common Stock IssuedRetained Earnings Total Common Stockholder's Equity
SharesPar ValueAdditional Paid In CapitalTotal
Common
Stockholder's
Equity
SharesPar ValueAdditional Paid
In Capital
Retained Earnings
Three Months Ended June 30, 2020 and 2019
Balance at March 31, 2019933.0  $93.3  $510.1  $338.6  $942.0  
Net income8.6  8.6  
Common dividends declared to parent(15.9) (15.9) 
Contribution of capital by parent3.5  3.5  
Balance at June 30, 2019933.0  $93.3  $513.6  $331.3  $938.2  
Three Months Ended June 30, 2021 and 2020Three Months Ended June 30, 2021 and 2020
Balance at March 31, 2020Balance at March 31, 2020933.0  $93.3  $547.3  $352.6  $993.2  Balance at March 31, 2020933 $93 $547 $353 $993 
Net incomeNet income12.112.1Net income12 12 
Common dividends declared to parentCommon dividends declared to parent(20.2) (20.2) Common dividends declared to parent(20)(20)
Contribution of capital by parentContribution of capital by parent30.4  30.4  Contribution of capital by parent30 30 
Balance at June 30, 2020Balance at June 30, 2020933.0  $93.3  $577.7  $344.5  $1,015.5  Balance at June 30, 2020933 $93 $577 $345 $1,015 
Balance at March 31, 2021Balance at March 31, 2021933 $93 $635 $382 $1,110 
Net incomeNet income1414
Common dividends declared to parentCommon dividends declared to parent(14)(14)
Contribution of capital by parentContribution of capital by parent
Balance at June 30, 2021Balance at June 30, 2021933 $93 $638 $382 $1,113 

Common Stock IssuedRetained EarningsTotal
Common
Stockholder's
Equity
SharesPar ValueAdditional Paid In Capital
Six Months Ended June 30, 2020 and 2019
Balance at Dec. 31, 2018933.0  $93.3  $510.1  $339.0  $942.4  
Net income32.6  32.6  
Common dividends declared to parent(40.3) (40.3) 
Contribution of capital by parent3.53.5  
Balance at June 30, 2019933.0  $93.3  $513.6  $331.3  $938.2  
Balance at Dec. 31, 2019933.0  $93.3  $537.3  $336.0  $966.6  
Net income45.7  45.7  
Common dividends declared to parent(37.1) (37.1) 
Contribution of capital by parent40.440.4
Adoption of ASC Topic 326(0.1) (0.1) 
Balance at June 30, 2020933.0  $93.3  $577.7  $344.5  $1,015.5  
See Notes to Consolidated Financial Statements

Common Stock IssuedRetained Earnings Total Common Stockholder's Equity
SharesPar ValueAdditional Paid
In Capital
Six Months Ended June 30, 2021 and 2020
Balance at Dec. 31, 2019933 $93 $537 $336 $966 
Net income46 46 
Common dividends declared to parent(37)(37)
Contribution of capital by parent40 40 
Balance at June 30, 2020933 $93 $577 $345 $1,015 
Balance at Dec. 31, 2020933 $93 $605 $370 $1,068 
Net income4646
Common dividends declared to parent(34)(34)
Contribution of capital by parent33 33 
Balance at June 30, 2021933 $93 $638 $382 $1,113 
See Notes to Consolidated Financial Statements




7

Table of Contents

NSP-WISCONSIN AND SUBSIDIARIES
Notes to Consolidated Financial Statements (UNAUDITED)
In the opinion of management, the accompanying unaudited consolidated financial statements contain all adjustments necessary to present fairly, in accordance with U.S. GAAP, the financial position of NSP-Wisconsin and its subsidiaries as of June 30, 20202021 and Dec. 31, 2019;2020; the results of its operations, including the components of net income, changes in stockholder's equity and comprehensive income for the three and six months ended June 30, 20202021 and 2019;2020; and its cash flows for the six months ended June 30, 20202021 and 2019. 2020.
All adjustments are of a normal, recurring nature, except as otherwise disclosed. Management has also evaluated the impact of events occurring after June 30, 20202021 up to the date of issuance of these consolidated financial statements. These statements contain all necessary adjustments and disclosures resulting from that evaluation. The Dec. 31, 20192020 balance sheet information has been derived from the audited 20192020 consolidated financial statements included in the NSP-Wisconsin Annual Report on Form 10-K for the year ended Dec. 31, 2019. These notes2020.
Notes to the consolidated financial statements have been prepared pursuant to the rules and regulations of the SEC for Quarterly Reports on Form 10-Q. Certain information and note disclosures normally included in financial statements prepared in accordance with GAAP on an annual basis have been condensed or omitted pursuant to such rules and regulations. For further information, refer to the consolidated financial statements and notes thereto included in the NSP-Wisconsin Annual Report on Form 10-K for the year ended Dec. 31, 2019,2020, filed with the SEC on Feb. 21, 2020.17, 2021. Due to the seasonality of NSP-Wisconsin’s electric and natural gas sales, interim results are not necessarily an appropriate base from which to project annual results.
1. Summary of Significant Accounting Policies
The significant accounting policies set forth in Note 1 to the consolidated financial statements in the NSP-Wisconsin Annual Report on Form 10-K for the year ended Dec. 31, 2019,2020 appropriately represent, in all material respects, the current status of accounting policies and are incorporated herein by reference.
2. Accounting Pronouncements
Recently Adopted
Credit Losses — In 2016, the FASB issued Financial Instruments - Credit Losses, Topic 326 (ASC Topic 326), which changes how entities account for losses on receivables and certain other assets. The guidance requires use of a current expected credit loss model, which may result in earlier recognition of credit losses than under previous accounting standards.
NSP-Wisconsin implemented the guidance using a modified-retrospective approach, recognizing aan immaterial cumulative effect charge of $0.1 million (after tax) to retained earnings on Jan 1. 2020. Other than first-time recognition of an allowance for doubtful accounts on accrued unbilled revenues, theThe Jan. 1, 2020 adoption of ASC Topic 326 did not have a significant impact on NSP-Wisconsin’s consolidated financial statements.
3. Selected Balance Sheet Data
(Millions of Dollars)June 30, 2020Dec. 31, 2019
(Millions of dollars)(Millions of dollars)June 30, 2021Dec. 31, 2020
Accounts receivable, netAccounts receivable, netAccounts receivable, net
Accounts receivableAccounts receivable$69.5  $64.7  Accounts receivable$68 $78 
Less allowance for bad debtsLess allowance for bad debts(6.1) (5.5) Less allowance for bad debts(7)(8)
Accounts receivable, netAccounts receivable, net$63.4  $59.2  Accounts receivable, net$61 $70 

(Millions of Dollars)June 30, 2020Dec. 31, 2019
(Millions of dollars)(Millions of dollars)June 30, 2021Dec. 31, 2020
InventoriesInventoriesInventories
Materials and suppliesMaterials and supplies$7.3  $6.8  Materials and supplies$$
FuelFuel4.1  4.0  Fuel
Natural gasNatural gas2.0  5.2  Natural gas
Total inventoriesTotal inventories$13.4  $16.0  Total inventories$15 $15 
(Millions of Dollars)June 30, 2020Dec. 31, 2019
Property, plant and equipment, net
Electric plant$3,070.6  $3,024.6  
Natural gas plant375.2  365.5  
Common and other property203.7  201.5  
Construction work in progress120.4  82.8  
Total property, plant and equipment3,769.9  3,674.4  
Less accumulated depreciation(1,353.1) (1,315.0) 
Property, plant and equipment, net$2,416.8  $2,359.4  

(Millions of dollars)June 30, 2021Dec. 31, 2020
Property, plant and equipment, net
Electric plant$3,253 $3,197 
Natural gas plant402 391 
Common and other property224 221 
Construction work in progress99 71 
Total property, plant and equipment3,978 3,880 
Less accumulated depreciation(1,437)(1,396)
Property, plant and equipment, net$2,541 $2,484 
4. Borrowings and Other Financing Instruments
Short-Term Borrowings
NSP-Wisconsin meets its short-term liquidity requirements primarily through the issuance of commercial paper and borrowings under its credit facility.facility and the money pool.
Money Pool — Xcel Energy Inc. and its utility subsidiaries have established a money pool arrangement that allows for short-term investments in and borrowings between the utility subsidiaries. Xcel Energy Inc. may make investments in the utility subsidiaries at market-based interest rates; however, the money pool arrangement does not allow the utility subsidiaries to make investments in Xcel Energy Inc.
Money pool borrowings for NSP-Wisconsin:
(Amounts in Millions, Except Interest Rates)Three Months Ended June 30, 2021Year Ended Dec. 31, 2020
Borrowing limit$150 $
Amount outstanding at period end33 
Average amount outstanding20 
Maximum amount outstanding41 
Weighted average interest rate, computed on a daily basis0.04 %N/A
Weighted average interest rate at period end0.02 N/A
Commercial Paper Commercial paper outstanding for NSP-Wisconsin was as follows:NSP-Wisconsin:
(Amounts in Millions, Except Interest Rates)(Amounts in Millions, Except Interest Rates)Three Months Ended June 30, 2020Year Ended Dec. 31, 2019(Amounts in Millions, Except Interest Rates)Three Months Ended June 30, 2021Year Ended Dec. 31, 2020
Borrowing limitBorrowing limit$150  $150  Borrowing limit$150 $150 
Amount outstanding at period endAmount outstanding at period end—  65  Amount outstanding at period end19 
Average amount outstandingAverage amount outstanding41  51  Average amount outstanding30 
Maximum amount outstandingMaximum amount outstanding91  93  Maximum amount outstanding95 
Weighted average interest rate, computed on a daily basisWeighted average interest rate, computed on a daily basis1.04 %2.38 %Weighted average interest rate, computed on a daily basisN/A1.59 %
Weighted average interest rate at period endWeighted average interest rate at period endN/A1.97  Weighted average interest rate at period endN/A0.17 
Letters of Credit — NSP-Wisconsin uses letters of credit, generally with terms of one year, to provide financial guarantees for certain operating obligations. At both June 30, 20202021 and Dec. 31, 2019,2020, there were 0 letters of credit outstanding.outstanding under the credit facility.
8

Table of Contents

Revolving Credit Facility In order to useissue its commercial paper, program to fulfill short-term funding needs, NSP-Wisconsin must have a revolving credit facility in place at least equal to the amount of its commercial paper borrowing limit and cannot issue commercial paper in an aggregate amount exceeding available capacity under this credit facility. The line of credit facility provides short-term financing in the form of notes payable to banks, letters of credit and back-up support for commercial paper borrowings.
NSP-Wisconsin has the right to request an extension of the revolving credit facility termination date for an additional one-year period. All extension requests are subject to majority bank group approval.
As of June 30, 2020,2021, NSP-Wisconsin had the following committed revolving credit facility available (in millions of dollars):
Credit Facility (a)
Credit Facility (a)
Outstanding (b)
Available
Credit Facility (a)
Outstanding (b)
Available
$150  $—  $150  150 $$150 
(a)This credit facility expiresExpires in June 2024.
(b)Includes outstanding commercial paper.
8

Table of Contents

All credit facility bankbank borrowings, outstanding letters of credit and outstanding commercial paper reduce the available capacity under the credit facility. NSP-Wisconsin had 0 direct advances on the credit facility outstanding at June 30, 20202021 and Dec. 31, 2019.2020.
Other Short-Term Borrowings As of June 30, 20202021 and Dec. 31, 2019,2020, Clearwater Investments, Inc., a NSP-Wisconsin subsidiary, had 0 notes payable to Xcel Energy Inc.
Long-Term Borrowings
During the six months ended June 30, 2020, NSP-Wisconsin issued $100 million of 3.05% first mortgage bonds due May 1, 2051.
5. Revenues
Revenue is classified by the type of goods/services rendered and market/customer type. NSP-Wisconsin’s operating revenues consistsconsisted of the following:
Three Months Ended June 30, 2020
(Millions of Dollars)ElectricNatural GasAll OtherTotal
Major revenue types
Revenue from contracts with customers:
Residential$59.6  $10.6  $—  $70.2  
C&I93.2  6.8  —  100.0  
Other2.0  —  0.2  2.2  
Total retail154.8  17.4  0.2  172.4  
Interchange41.5  —  —  41.5  
Other0.1  1.1  —  1.2  
Total revenue from contracts with customers196.4  18.5  0.2  215.1  
Alternative revenue and other2.9  0.5  —  3.4  
Total revenues$199.3  $19.0  $0.2  $218.5  
Three Months Ended June 30, 2019Three Months Ended
June 30, 2021
(Millions of Dollars)(Millions of Dollars)ElectricNatural GasAll OtherTotal(Millions of Dollars)ElectricNatural GasTotal
Major revenue typesMajor revenue typesMajor revenue types
Revenue from contracts with customers:Revenue from contracts with customers:Revenue from contracts with customers:
ResidentialResidential$54.1  $10.8  $—  $64.9  Residential$64 $15 $79 
C&IC&I105.1  8.6  —  113.7  C&I108 15 123 
OtherOther2.1  —  0.1  2.2  Other
Total retailTotal retail161.3  19.4  0.1  180.8  Total retail174 30 204 
InterchangeInterchange43.5  —  —  43.5  Interchange46 46 
OtherOther0.1  0.9  —  1.0  Other
Total revenue from contracts with customersTotal revenue from contracts with customers204.9  20.3  0.1  225.3  Total revenue from contracts with customers221 31 252 
Alternative revenue and otherAlternative revenue and other3.0  0.6  —  3.6  Alternative revenue and other
Total revenuesTotal revenues$207.9  $20.9  $0.1  $228.9  Total revenues$224 $31 $255 
Six Months Ended June 30, 2020Three Months Ended
June 30, 2020
(Millions of Dollars)(Millions of Dollars)ElectricNatural GasAll OtherTotal(Millions of Dollars)ElectricNatural GasTotal
Major revenue typesMajor revenue typesMajor revenue types
Revenue from contracts with customers:Revenue from contracts with customers:Revenue from contracts with customers:
ResidentialResidential$124.6  $35.1  $—  $159.7  Residential$60 $10 $70 
C&IC&I193.6  26.3  —  219.9  C&I93 100 
OtherOther3.6  —  0.2  3.8  Other
Total retailTotal retail321.8  61.4  0.2  383.4  Total retail155 17 172 
InterchangeInterchange82.4  —  —  82.4  Interchange41 41 
OtherOther0.6  1.9  —  2.5  Other
Total revenue from contracts with customersTotal revenue from contracts with customers404.8  63.3  0.2  468.3  Total revenue from contracts with customers196 18 214 
Alternative revenue and otherAlternative revenue and other6.3  0.9  —  7.2  Alternative revenue and other
Total revenuesTotal revenues$411.1  $64.2  $0.2  $475.5  Total revenues$199 $19 $218 
Six Months Ended June 30, 2019Six Months Ended June 30, 2021
(Millions of Dollars)(Millions of Dollars)ElectricNatural GasAll OtherTotal(Millions of Dollars)ElectricNatural GasTotal
Major revenue typesMajor revenue typesMajor revenue types
Revenue from contracts with customers:Revenue from contracts with customers:Revenue from contracts with customers:
ResidentialResidential$121.5  $44.4  $—  $165.9  Residential$135 $46 $181 
C&IC&I203.6  34.4  —  238.0  C&I211 39 250 
OtherOther3.6  —  0.2  3.8  Other
Total retailTotal retail328.7  78.8  0.2  407.7  Total retail349 85 434 
InterchangeInterchange87.6  —  —  87.6  Interchange92 92 
OtherOther0.6  2.0  —  2.6  Other
Total revenue from contracts with customersTotal revenue from contracts with customers416.9  80.8  0.2  497.9  Total revenue from contracts with customers442 87 529 
Alternative revenue and otherAlternative revenue and other6.0  1.2  —  7.2  Alternative revenue and other
Total revenuesTotal revenues$422.9  $82.0  $0.2  $505.1  Total revenues$448 $88 $536 
Six Months Ended June 30, 2020
(Millions of Dollars)ElectricNatural GasTotal
Major revenue types
Revenue from contracts with customers:
Residential$125 $35 $160 
C&I194 26 220 
Other
Total retail322 61 383 
Interchange82 82 
Other
Total revenue from contracts with customers405 63 468 
Alternative revenue and other
Total revenues$411 $64 $475 

6. Income Taxes
Note 7 to the consolidated financial statements included in NSP-Wisconsin’s Annual Report on Form 10-K for the year ended Dec. 31, 20192020 represents, in all material respects, the current status of other income tax matters except to the extent noted below, and are incorporated herein by reference.
The following table reconciles the difference
9

Table of Contents

Difference between the statutory rate and the ETR:
Six Months Ended June 30Six Months Ended June 30
202020192021
2020 (a)
Federal statutory rateFederal statutory rate21.0 %21.0 %Federal statutory rate21.0 %21.0 %
State tax (net of federal tax effect)State tax (net of federal tax effect)6.2  6.2  State tax (net of federal tax effect)6.2 6.2 
Increases (decreases) in tax from:Increases (decreases) in tax from:Increases (decreases) in tax from:
Plant regulatory differences (a)(b)
Plant regulatory differences (a)(b)
(18.4) (0.5) 
Plant regulatory differences (a)(b)
(5.4)(18.4)
Nonplant ADIT amortization(12.5) —  
Amortization of excess nonplant deferred taxesAmortization of excess nonplant deferred taxes(12.5)
Tax credits, net of NOL & tax credit allowancesTax credits, net of NOL & tax credit allowances(1.7) (1.0) Tax credits, net of NOL & tax credit allowances(1.3)(1.7)
Prior period adjustments—  2.2  
Other (net)Other (net)0.8  0.3  Other (net)0.2 0.9 
Effective income tax rateEffective income tax rate(4.6)%28.2 %Effective income tax rate20.7 %(4.5)%
(a)     Prior periods have been restated to conform to current year presentation.
(b) Regulatory differences for income tax primarily relatesrelate to the credit of excess deferred taxes to customers through the average rate assumption method. Income tax benefits associated with the credit of excess deferred credits are offset by corresponding revenue reductions.
9

Table of Contents

Federal Audits — NSP-Wisconsin is a member of the Xcel Energy affiliated group that files a consolidated federal income tax return. Statute of limitations applicable to Xcel Energy’s consolidated federal income tax returns expire as follows:
Tax YearsExpiration
20092014 - 20132016January 2022
2017September 2020
2014 - 2016June 2021
In 2017,Additionally, the IRS concluded the auditstatute of limitations related to a federal tax years 2012 and 2013 and proposed an adjustment that would impact Xcel Energy’s NOL and ETR.loss carryback claim filed in 2020 has been extended. Xcel Energy filedhas recognized its best estimate of income tax expense that will result from a protest withfinal resolution of this issue; however, the IRS. In April 2020, Xcel Energyoutcome and Appeals reached an agreement and no material adjustments were required.
In 2018, the IRS began an audittiming of tax years 2014-2016. As of June 30, 2020, 0 adjustments have been proposed.a resolution is unknown.
State Audits — NSP-Wisconsin is a member of the Xcel Energy affiliated group that files consolidated state income tax returns. As of June 30, 2020,2021, NSP-Wisconsin’s earliest open tax year subject to examination by state taxing authorities under applicable statutes of limitations is 2014.2016. In 2018,March 2021, Wisconsin began an audit of tax years 2014-2016. As of June 30, 2020, 02016 - 2019. No material adjustments have been proposed.
Unrecognized Benefits Unrecognized The unrecognized tax benefit balance includes permanent tax positions, which if recognized would affect the annual ETR. In addition, the unrecognized tax benefit balance includes temporary tax positions for which ultimate deductibility is highly certain, but for which there is uncertainty about the timing of such deductibility.timing. A change in the periodtiming of deductibility would not affect the ETR but would accelerate the payment to the taxing authority to an earlier period.authority.
Unrecognized tax benefits — permanent vs. temporary:
(Millions of Dollars)(Millions of Dollars)June 30, 2020Dec. 31, 2019(Millions of Dollars)June 30, 2021Dec. 31, 2020
Unrecognized tax benefit — Permanent tax positionsUnrecognized tax benefit — Permanent tax positions$2.6  $2.6  Unrecognized tax benefit — Permanent tax positions$$
Unrecognized tax benefit — Temporary tax positionsUnrecognized tax benefit — Temporary tax positions0.8  0.8  Unrecognized tax benefit — Temporary tax positions
Total unrecognized tax benefitTotal unrecognized tax benefit$3.4  $3.4  Total unrecognized tax benefit$$
Unrecognized tax benefits were reduced by tax benefits associated with NOL and tax credit carryforwards:
(Millions of Dollars)June 30, 2020Dec. 31, 2019
NOL and tax credit carryforwards$(2.1) $(2.2) 
Net deferred tax liability associated with the unrecognized tax benefit amounts and related NOLs and tax credits carryforwards were $1.3 million at June 30, 2020 and $1.2 million at Dec. 31, 2019.
(Millions of Dollars)June 30, 2021Dec. 31, 2020
NOL and tax credit carryforwards$(2)$(2)
As the IRS audits resume and state audits progress,audit progresses, it is reasonably possible that the amount of unrecognized tax benefit could decrease up to approximately $1.8$1 million in the next 12 months.
Payables for interest related to unrecognized tax benefits were not material and 0 amounts were accrued for penalties related to unrecognized tax benefits as of June 30, 2020 and2021 or Dec. 31, 2019, respectively.
2020.
7. Fair Value of Financial Assets and Liabilities
Fair Value Measurements
Accounting guidance for fair value measurements and disclosures provides a single definition of fair value and requires disclosures about assets and liabilities measured at fair value. A hierarchical framework for disclosing the observability of the inputs utilized in measuring assets and liabilities at fair value is established by this guidance.
Level 1 — Quoted prices are available in active markets for identical assets or liabilities as of the reporting date. The types of assets and liabilities included in Level 1 are highly liquid and actively traded instruments with quoted prices;prices.
Level 2 — Pricing inputs are other than quoted prices in active markets, but are either directly or indirectly observable as of the reporting date. The types of assets and liabilities included in Level 2 are typically either comparable to actively traded securities or contracts, or priced with models using highly observable inputs; andinputs.
Level 3 — Significant inputs to pricing have little or no observability as of the reporting date. The types of assets and liabilities included in Level 3 are those valued with models requiring significant management judgment or estimation.
Specific valuation methods include:
Cash equivalents — The fair values of cash equivalents are generally based on cost plus accrued interest; money market funds are measured using quoted net asset value.
Interest rate derivatives The fair values of interest rate derivatives are based on broker quotes that utilize current market interest rate forecasts.
Commodity derivatives The methods used to measure the fair value of commodity derivative forwards and options utilize forward prices and volatilities, as well as pricing adjustments for specific delivery locations, and are generally assigned a Level 2 classification.
When contractual settlements relate to inactive delivery locations or extend to periods beyond those readily observable on active exchanges or quoted by brokers, the significance of the use of less observable forecasts of forward prices and volatilitiesinputs on a valuation is evaluated and may result in Level 3 classification.
Derivative Instruments Fair Value Measurements
NSP-Wisconsin enters into derivative instruments, including forward contracts, futures, swaps and options, for trading purposes and to manage risk in connection with changes in interest rates and utility commodity prices.
Interest Rate Derivatives NSP-Wisconsin may enter into various instruments that effectively fix the yield or price on a specified benchmark interest rate for an anticipated debt issuance for a specific period. These derivative instruments are generally designated as cash flow hedges for accounting purposes. As of June 30, 20202021 and Dec. 31, 2019,2020, there were 0 interest rate derivatives designated as cash flow hedges.
Commodity Derivatives NSP-Wisconsin may enter into derivative instruments to manage variability of future cash flows from changes in commodity prices in its electric and natural gas operations, as well as for trading purposes. This could include the purchase or sale of natural gas to generate electric energy and natural gas for resale.
10

Table of Contents

Gross notional amounts of commodity options:
(Amounts in Millions) (a)(b)
June 30, 2020Dec. 31, 2019
Million British thermal units of natural gas0.4  0.1  
(a)Amounts are not reflective of net positions in the underlying commodities.
(b)Notional amounts for options are included on a gross basis, but are weighted for the probability of exercise.
Consideration of Credit Risk and Concentrations — NSP-Wisconsin continuously monitors the creditworthiness of counterparties to its interest rate derivatives and commodity derivative contracts prior to settlement, and assesses each counterparty’s ability to perform on the transactions set forth in the contracts. Impact of credit risk was immaterial to the fair value of unsettled commodity derivatives presented inon the consolidated balance sheets.
Impact of Derivative Activities on Income and Accumulated Other Comprehensive LossChanges in the fair value of natural gas commodity derivatives resulted in $0.1 million net0 gains or losses and immaterial net$1 million in losses for the three and six months ended June 30, 2020,2021, respectively, which were recognized as regulatory assets and liabilities. There were immaterial net losses for the three and six months ended June 30, 2019, respectively, which were recognized as regulatory assets and liabilities.2020. The classification as a regulatory asset or liability is based on commission approved regulatory recovery mechanisms.
During both the three months ended June 30, 20202021 and 2019,2020, there were 0 settlement gains or losses on natural gas commodity derivatives. During the six months ended June 30, 20202021 and 2019,2020, there were $0.9$1 million of net settlement losses, and $0.2 million of net settlement gains on natural gas commodity derivatives, respectively, which were recognized subject to purchased natural gas cost recovery mechanisms, which result in reclassifications of derivative settlement gains and losses out of income to a regulatory asset or liability, as appropriate.
NSP-Wisconsin had 0 derivative instruments designated as fair value hedges during the three and six months ended June 30, 20202021 and 2019,2020, respectively.
Recurring Fair Value Measurements As of June 30, 2021, there were immaterial derivative assets measured at fair value on a recurring basis. At Dec. 31, 2020, NSP-Wisconsin's derivative assets measured at fair value on a recurring basis were as follows:
June 30, 2020Dec. 31, 2020
Fair ValueFair Value
Total
Netting (a)
Total (b)
Fair ValueFair Value Total
Netting (a)
Total (b)
(Millions of Dollars)(Millions of Dollars)Level 1Level 2Level 3
Total (b)
Level 1Level 2Level 3Fair Value Total
Netting (a)
Total (b)
Current derivative assetsCurrent derivative assetsCurrent derivative assets
Natural gas commodityNatural gas commodity$—  $0.2  $—  $0.2  $—  $0.2  Natural gas commodity$$$$$$
Dec. 31, 2019
Fair ValueFair Value
Total
Netting (a)
Total (b)
(Millions of Dollars)Level 1Level 2Level 3
Current derivative assets
Natural gas commodity$—  $0.5  $—  $0.5  $—  $0.5  
(a)    NSP-Wisconsin nets derivative instruments and related collateral inon its consolidated balance sheetsheets when supported by a legally enforceable master netting agreement, and all derivative instruments and related collateral amounts were subject to master netting agreements at June 30, 2020 and Dec. 31, 2019.2020. The counterparty netting amounts presented exclude settlement receivables and payables and non-derivative amounts that may be subject to the same master netting agreements.
(b)    Included in prepayments and other current assets balance of $4.9 million at June 30, 2020 and $4.6$7 million at Dec. 31, 2019 in2020 on the consolidated balance sheets.
Fair Value of Long-Term Debt
Other financial instruments for which the carrying amount did not equal fair value:
June 30, 2020Dec. 31, 2019June 30, 2021Dec. 31, 2020
(Millions of Dollars)(Millions of Dollars)Carrying AmountFair ValueCarrying AmountFair Value(Millions of Dollars)Carrying AmountFair ValueCarrying AmountFair Value
Long-term debt, including current portionLong-term debt, including current portion$906.0  $1,124.3  $808.0  $924.3  Long-term debt, including current portion$907 $1,067 $906 $1,124 
Fair value of NSP-Wisconsin’s long-term debt is estimated based on recent trades and observable spreads from benchmark interest rates for similar securities. Fair value estimates are based on information available to management as of June 30, 20202021 and Dec. 31, 2019,2020 and given the observability of the inputs, fair values presented for long-term debt were assigned as Level 2.
8. Benefit Plans and Other Postretirement Benefits
Components of Net Periodic Benefit Cost (Credit)
Three Months Ended June 30Three Months Ended June 30
202020192020201920212020
(Millions of Dollars)(Millions of Dollars)Pension BenefitsPostretirement Health
Care Benefits
(Millions of Dollars)Pension Benefits
Service costService cost$1.2  $1.1  $—  $—  Service cost$$
Interest cost (a)
Interest cost (a)
1.2  1.4  0.1  0.1  
Interest cost (a)
Expected return on plan assets (a)
Expected return on plan assets (a)
(2.1) (2.0) —  —  
Expected return on plan assets (a)
(2)(2)
Amortization of prior service credit (a)
—  —  (0.1) (0.1) 
Amortization of net loss (a)
Amortization of net loss (a)
1.2  1.1  0.1  0.1  
Amortization of net loss (a)
Net periodic benefit costNet periodic benefit cost$1.5  $1.6  $0.1  $0.1  Net periodic benefit cost$$
Costs not recognized due to effects of
regulation
1.8  —  —  —  
Effects of regulationEffects of regulation
Net benefit cost recognized for financial reportingNet benefit cost recognized for financial reporting$3.3  $1.6  $0.1  $0.1  Net benefit cost recognized for financial reporting$$
Six Months Ended June 30Six Months Ended June 30
202020192020201920212020
(Millions of Dollars)(Millions of Dollars)Pension BenefitsPostretirement Health
Care Benefits
(Millions of Dollars)Pension Benefits
Service costService cost$2.3  $2.2  $—  $—  Service cost$$
Interest cost (a)
Interest cost (a)
2.4  2.9  0.2  0.3  
Interest cost (a)
Expected return on plan assets (a)
Expected return on plan assets (a)
(4.2) (4.2) —  —  
Expected return on plan assets (a)
(4)(4)
Amortization of prior service credit (a)
—  —  (0.1) (0.2) 
Amortization of net loss (a)
Amortization of net loss (a)
2.4  2.2  0.1  0.1  
Amortization of net loss (a)
Net periodic benefit costNet periodic benefit cost$2.9  $3.1  $0.2  $0.2  Net periodic benefit cost$$
Costs not recognized due to effects of
regulation
3.7  0.2  —  —  
Effects of regulationEffects of regulation
Net benefit cost recognized for financial reportingNet benefit cost recognized for financial reporting$6.6  $3.3  $0.2  $0.2  Net benefit cost recognized for financial reporting$$
(a)     The components of net periodic cost other than the service cost component are included in the line item “other“Other expense, net” in the consolidated statementstatements of income or capitalized on the consolidated balance sheetsheets as a regulatory asset.
In January 2020,2021, contributions of $150.0$125 million were made across 4 of Xcel Energy’s pension plans, of which $6.7$5 million was attributable to NSP-Wisconsin. Xcel Energy does not expect additional pension contributions during 2020.
11
2021.

Table of Contents

9. Commitments and Contingencies
The following includes commitments, contingencies and unresolved contingencies that are material to NSP-Wisconsin’s financial position.
Legal
NSP-Wisconsin is involved in various litigation matters in the ordinary course of business. The assessment of whether a loss is probable or is a reasonable possibility, and whether the loss or a range of loss is estimable, often involves a series of complex judgments about future events. Management maintains accruals for losses probable of being incurred and subject to reasonable estimation. Management is sometimes unable to estimate an amount or range of a reasonably possible loss in certain situations, including but not limited to when (1) the damages sought are indeterminate, (2) the proceedings are in the early stages, or (3) the matters involve novel or unsettled legal theories.
In such cases, there is considerable uncertainty regarding the timing or ultimate resolution of such matters, including a possible eventual loss. For current proceedings not specifically reported herein, management does not anticipate that the ultimate liabilities, if any, would have a material effect on NSP-Wisconsin’s consolidated financial statements. Unless otherwise required by GAAP, legalLegal fees are generally expensed as incurred.
11

Table of Contents

Gas Trading Litigation e prime is a wholly owned subsidiary of Xcel Energy. e prime was in the business of natural gas trading and marketing but has not engaged in natural gas trading or marketing activities since 2003. Multiple lawsuits involving multiple plaintiffs seeking monetary damages were commenced against e prime and its affiliates, including Xcel Energy, between 2003 and 2009 alleging fraud and anticompetitive activities in conspiring to restrain the trade of natural gas and manipulate natural gas prices. Cases were all consolidated in the U.S. District Court in Nevada.
NaNTwo cases remain active which include an MDL matter consisting of a Colorado purported class (Breckenridge) and a Wisconsin purported class (Arandell Corp.).
Breckenridge/Colorado — In February 2019, the MDL panel remanded Breckenridge back to the U.S. District Court in Colorado.Colorado. Settlement of approximately $3 million was reached in February 2021. The parties have sought and are awaiting court approval of the settlement. A hearing was held on July 22, 2021. A decision is anticipated in Q3.
Arandell Corp.In February 2019,The trial has been vacated and will be rescheduled after the case was remanded back tocourt rules on the U.S. District Court in Wisconsin. Plaintiffs are seekingpending motions for reconsideration and for class certification. It is uncertain when the court will rule on this issue.
Xcel Energy has concluded that a loss is remote for boththe remaining lawsuits.lawsuit.
Rate Matters
MISO ROE Complaints —In— In November 2013 and February 2015, customerscustomer groups filed two ROE complaints against MISO TOs, includingwhich includes NSP-Minnesota and NSP-Wisconsin.
The first complaint argued forrequested a reduction in the base ROE in MISO transmission formula rates from 12.38% to 9.15%, for the time period of Nov. 12, 2013 to Feb. 11, 2015, and removal of ROE adders (including those for RTO membership). The second complaint sought to reducerequested, for a subsequent time period, a base ROE reduction from 12.38% to 8.67%.
In September 2016, the FERC issued an order (Opinion No. 551) granting a 10.32% base ROE (10.82% with the RTO adder) effective for the first complaint period of Nov. 12, 2013 to Feb. 11, 2015 and subsequent to the date of the order. The United States Court of Appeals for the District of ColumbiaD.C Circuit subsequently vacated and remanded FERC Opinion No. 531, which had established the ROE methodology on which the September 2016 FERC order was based.551.
In November 2019, the FERC issued an order adopting a new ROE methodology and settling(Opinion No. 569), which set the MISO base ROE at 9.88% (10.38% with the RTO adder), effective Sept. 28, 2016 and for the Nov. 12, 2013 to Feb. 11, 2015 refundfirst complaint period. The FERC also dismissed the second complaint. In December 2019, MISO TOs filed a request for rehearing.rehearing regarding the new ROE methodology announced in Opinion No. 569. Customers also filed requests for rehearing claiming, among other points, that the FERC erred by dismissing the second complaint without refunds.
In March 2020, the FERC issued a Notice of Proposed Rulemaking regarding changes to its policies for transmission incentives, including a proposal to increase the RTO participation adder from 50 to 100 basis points and to make the adder available regardless of whether a utility’s ongoing participation in the RTO is voluntary or required by legislation or a regulator.
In May 2020, the FERC issued Opinionan order (Opinion No. 569-A,569-A) which granted rehearing in part to Opinion 569 and further refined the FERC’s ROE methodology, most significantly to incorporate the risk premium model (in addition to the discounted cash flow and capital asset pricing models), resulting in a new base ROE of 10.02%, effective Sept. 28, 2016 and for the refund period in the first complaint.complaint period. The FERC also affirmed its decision in Opinion No. 569 to dismiss the second complaint.
Although
In November 2020, the May 2020 Order remains subjectFERC issued an order (Opinion No. 569-B) in response to pending requestsrehearing requests. The FERC corrected certain inputs to its ROE calculation model, did not change the ROE effective Sept. 28, 2016, and for rehearing, as well as the pending judicial review,first MISO complaint period and upheld its decision to deny refunds for the second complaint period. NSP-Minnesota has recognized a liability has been recognized for theits best estimate of final refunds to customers. Each 10 basis point reduction in ROE for the first complaint period, second complaint period, and subsequent period relative to amounts accrued would reduce Xcel Energy’s net income by $1 million, $1 million, and $2 million, respectively.
The MISO TOs and various parties have filed petitions for review of Opinion Nos. 569, 569-A and 569-B at the D.C. Circuit with initial briefs filed in March 2021 and final briefs expected in August 2021.
FERC NOPR on ROE Incentive Adders — In April 2021, the FERC issued a NOPR proposing to limit collection of ROE incentive adders for RTO membership to the first three years after an entity begins participation in an RTO. If adopted as a final rule, following a comment period expected to be complete by the end of 2021 or 2022, NSP-Wisconsin would prospectively discontinue charging their current 0.5% ROE incentive adders. Amounts related to a discontinuance of the adder would ultimately be offset by an increase in retail rates, following future rate cases.
Environmental
MGP, Landfill and Disposal Sites
Ashland MGP Site — NSP-Wisconsin was named a responsible party for contamination at the Ashland/Northern States Power Lakefront Superfund Site (the Site) in Ashland, Wisconsin. Remediation was completed in 2019 and restoration activities were completed in 2020. Groundwater treatment activities will continue for many years.
The cost estimate for remediation and restoration of the entire site is approximately $199.1 million. At June 30, 2020 and Dec. 31, 2019, NSP-Wisconsin had a total liability of $21.4 million and $23.2 million, respectively, for the entire site.
NSP-Wisconsin has deferred the unrecovered portion of the estimated Site remediation and restoration costs as a regulatory asset. The PSCW has authorized NSP-Wisconsin rate recovery for all remediation and restoration costs incurred at the Site and application of a 3% carrying charge to the regulatory asset.
In addition to the Ashland Site, NSP-Wisconsin is currently investigating, remediating or performing post-closure actions at 2 other MGP, landfill or other disposal sites across its service territories.
NSP-Wisconsin has recognized its best estimate of costs/liabilities that will result from final resolution of these issues, however, the outcome and timing is unknown. In addition, there may be insurance recovery and/or recovery from other potentially responsible parties, offsetting a portion of costs incurred.
12

Table of Contents

10. Segment Information
NSP-Wisconsin evaluates performance based on profit or loss generated from the product or service provided. These segments are managed separately because the revenue streams are dependent upon regulated rate recovery, which is separately determined for each segment.
NSP-Wisconsin has the following reportable segments:
Regulated Electric — The regulated electric utility segment generates electricity, which is transmitted and distributed in Wisconsin and Michigan; andMichigan.
Regulated Natural Gas — The regulated natural gas utility segment purchases, transports, stores and distributes natural gas in portions of Wisconsin and Michigan.
NSP-Wisconsin presents Other, which includes operating segments with revenues below the necessary quantitative thresholds. Those operating segments primarily include investments in rental housing projects that qualify for low-income housing tax credits.
Asset and capital expenditure information is not provided for NSP-Wisconsin's reportable segments. As an integrated electric and natural gas utility, NSP-Wisconsin operates significant assets that are not dedicated to a specific business segment. Reporting assets and capital expenditures by business segment would require arbitrary and potentially misleading allocations, which may not necessarily reflect the assets that would be required for the operation of the business segments on a stand-alone basis.
Certain costs, such as common depreciation, common O&M expenses and interest expense are allocated based on cost causation allocators across each segment. In addition, a general allocator is used for certain general and administrative expenses, including office supplies, rent, property insurance and general advertising.
12

Table of Contents

NSP-Wisconsin's segment information for the three and six months ended June 30:information:
Three Months Ended June 30
(Millions of Dollars)20202019
Regulated Electric
Operating revenues (a)
$199.3  $207.9  
Intersegment revenues0.1  0.1  
Total operating revenue$199.4  $208.0  
Net income16.3  10.9  
Regulated Natural Gas
Operating revenues
$19.0  $20.9  
Intersegment revenues0.2  —  
Total operating revenue$19.2  $20.9  
Net loss(2.9) (1.3) 
All Other
Operating revenues
$0.2  $0.1  
Net loss(1.3) (1.0) 
Consolidated Total
Operating revenues (a)
$218.8  $229.0  
Reconciling eliminations(0.3) (0.1) 
Total operating revenues$218.5  $228.9  
Net income12.1  8.6  
Three Months Ended June 30
(Millions of Dollars)20212020
Regulated Electric
Total revenues (a)
$224 $199 
Net income16 16 
Regulated Natural Gas
Total revenues$31 $19 
Net loss(2)(3)
All Other
Total revenues$$
Net loss(1)
Consolidated Total
Total revenues (a)
$255 $218 
Net income14 12 
(a)OperatingTotal revenues include $41.5$46 million and $43.5$41 million of affiliate electric revenue for the three months ended June 30, 20202021 and 2019,2020, respectively.
Six Months Ended June 30
(Millions of Dollars)20212020
Regulated Electric
Total revenues (a)
$448 $411 
Net income40 41 
Regulated Natural Gas
Total revenues$88 $64 
Net income
All Other
Total revenues$$
Net loss(1)
Consolidated Total
Total revenues (a)
$536 $475 
Net income46 46 
Six Months Ended June 30
(Millions of Dollars)20202019
Regulated Electric
Operating revenues (a)
$411.1  $422.9  
Intersegment revenues0.2  0.2  
Total operating revenue$411.3  $423.1  
Net income41.0  24.1  
Regulated Natural Gas
Operating revenues
$64.2  $82.0  
Intersegment revenues0.3  0.2  
Total operating revenues$64.5  $82.2  
Net income6.0  9.2  
All Other
Operating revenues
$0.2  $0.2  
Net loss(1.3) (0.7) 
Consolidated Total
Operating revenues (a)
$476.0  $505.5  
Reconciling eliminations(0.5) (0.4) 
Total operating revenues$475.5  $505.1  
Net income45.7  32.6  
(a)OperatingTotal revenues include $82.4$92 million and $87.6$82 million of affiliate electric revenue for the six months ended June 30, 2021 and 2020, and 2019, respectively.

ITEM 2 — MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS
Discussion of financial condition and liquidity for NSP-Wisconsin is omitted per conditions set forth in general instructionsGeneral Instructions H(1)(a) and (b) of Form 10-Q for wholly owned subsidiaries. It is replaced with management’s narrative analysis of the results of operations set forth in general instructionsGeneral Instruction H(2)(a) of Form 10-Q for wholly owned subsidiaries (reduced disclosure format).
Non-GAAP Financial Measures
The following discussion includes financial information prepared in accordance with GAAP, as well as certain non-GAAP financial measures such as electric margin and natural gas margin, and ongoing earnings.margin. Generally, a non-GAAP financial measure is a measure of a company’s financial performance, financial position or cash flows that excludes (or includes) amounts that are adjusted from measures calculated and presented in accordance with GAAP.
NSP-Wisconsin’s management uses non-GAAP measures for financial planning and analysis, for reporting of results to the Board of Directors, in determining performance-based compensation and communicating its earnings outlook to analysts and investors. Non-GAAP financial measures are intended to supplement investors’ understanding of our performance and should not be considered alternatives for financial measures presented in accordance with GAAP. These measures are discussed in more detail below and may not be comparable to other companies’ similarly titled non-GAAP financial measures.
Electric and Natural Gas Margins
Electric margin is presented as electric revenues less electric fuel and purchased power expenses. Natural gas margin is presented as natural gas revenues less the cost of natural gas sold and transported. Expenses incurred for electric fuel and purchased power and the cost of natural gas are generally recovered through various regulatory recovery mechanisms. As a result, changes in these expenses are generally offset in operating revenues.
13

Table of Contents

Management believes electric and natural gas margins provide the most meaningful basis for evaluating our operations because they exclude the revenue impact of fluctuations in these expenses. These margins can be reconciled to operating income, a GAAP measure, by including other operating revenues, O&M expenses, conservation, depreciation and amortization and taxes (other than income taxes).
Results of Operations
NSP-Wisconsin’s year-to-date net income was approximately $45.7flat compared with the same period in 2020 ($46 million for both the six months ended June 30, 2020 compared with approximately $32.6 million for the prior year. The increase was driven by lower O&M2021 and income taxes, as well as higher electric margin (due primarily to regulatory outcomes which offset lower sales from COVID-19), partially offset by lower natural gas margins due to unfavorable weather and increased depreciation.2020).
Electric Margin
Electric production expenses tend to vary with the quantity of electricity sold and changes in the unit costs of fuel and purchased power. The electric fuel and purchased power cost recovery mechanism of the Wisconsin jurisdiction may not allow for complete recovery of all expenses and, therefore, changes in fuel or purchased power costs can impact earnings.
Electric revenues and margin:
Six Months Ended June 30Six Months Ended June 30
(Millions of Dollars)(Millions of Dollars)20202019(Millions of Dollars)20212020
Electric revenuesElectric revenues$411.1  $422.9  Electric revenues$448 $411 
Electric fuel and purchased powerElectric fuel and purchased power(191.9) (208.4) Electric fuel and purchased power(216)(192)
Electric marginElectric margin$219.2  $214.5  Electric margin$232 $219 
Changes in electric margin:
(Millions of Dollars)2020Six Months Ended June 30, 2021 vs. 20192020
Regulatory rate outcomes$14.012 
Estimated impact of weather
Sales and demand (a)
Interchange agreement billings with NSP-Minnesota4.2 (6)
Sales and demand (a)
(6.9)
Purchased capacity costs(6.8)
Estimated impact of weather(1.0)
Other (net)1.2 (1)
Total increase in electric margin$4.713 
(a)Sales decline excludes weather impact.
13

Table of Contents

Natural Gas Margin
Total natural gas expense varies with changing sales requirements and the cost of natural gas. However, fluctuations in the cost of natural gas hashave minimal impact on natural gas margin due to natural gas cost recovery mechanisms.
Natural gas revenues and margin:
Six Months Ended June 30Six Months Ended June 30
(Millions of Dollars)(Millions of Dollars)20202019(Millions of Dollars)20212020
Natural gas revenuesNatural gas revenues$64.2  $82.0  Natural gas revenues$88 $64 
Cost of natural gas sold and transportedCost of natural gas sold and transported(28.0) (40.5) Cost of natural gas sold and transported(51)(28)
Natural gas marginNatural gas margin$36.2  $41.5  Natural gas margin$37 $36 
Changes in natural gas margin:
(Millions of Dollars)2020Six Months Ended June 30, 2021 vs. 20192020
Estimated impact of weather$(4.1)
Regulatory rate outcomes (Wisconsin)(1.6)
Sales growth1.01 
Other (net)(0.6)
Total decreaseincrease in natural gas margin$(5.3)
Non-Fuel Operating Expenses and Other Items
O&M Expenses— O&M expenses decreased $9.7 million, or 9.4%, for the six months ended June 30, 2020 compared with the prior year. The decrease was primarily due to cost mitigation efforts to offset the negative impacts of COVID-19 including allocation of workforce, material and supply management, performance of maintenance, as well as, interchange billings with NSP-Minnesota and employee healthcare expenses.
Depreciation and Amortization — Depreciation and amortization expense increased $8.9decreased $4 million, or 13.0%5.2%, for the six months ended June 30, 2020 compared with the prior year.year-to-date. The increase was primarilydecrease is due to increased MGPlower amortization and electric distribution plant additionsof environmental regulatory assets, partially offset by normal system expansion and deferred tax liability amortization.
IncomeIncome Taxes Income tax expense decreased $14.8increased $14 million for the first six months ended June 30, 2020 compared with the prior year.of 2021. The decreaseincrease was primarily driven by an increasea decrease in plant regulatory differences, lower non-plant accumulated deferred income tax amortization and nonplant ADIT amortization. The ETR was (4.6%) for the six months ended June 30, 2020 compared with 28.2% for the same periodhigher pretax earnings in 2019, largely due to the items referenced above.2021.
See Note 6 to the consolidated financial statements for further information.
Other
Winter Storm Uri
In February 2021, the central portion of the United States experienced a major winter storm (Winter Storm Uri). Extreme cold temperatures impacted certain operational assets as well as the availability of renewable generation across the region. The cold weather also affected the country’s supply and demand for natural gas. These factors contributed to extremely high market prices for natural gas and electricity.
As a result of the extremely high market prices, NSP-Wisconsin incurred net natural gas, fuel and purchased energy costs of approximately $45 million (largely deferred as regulatory assets) in the first quarter. Certain energy transactions are subject to final/settlement calculation adjustments, including the impacts of credit losses shared among market participants. Such adjustments are not expected to be material to our results of operations, financial condition or cash flows.
Regulatory Overview — NSP-Wisconsin has natural gas, fuel and purchased energy mechanisms in each jurisdiction for recovering incurred costs. However, February cost increases were deferred for future recovery with recovery proposed over a period of up to ten months to mitigate the impact to customer bills. Additionally, NSP-Wisconsin is not requesting recovery of financing costs in order to further limit the impact to our customers.

Proceedings initiated:
JurisdictionRegulatory Status
WisconsinIn March, the PSCW approved NSP-Wisconsin's proposal to recover $45 million of natural gas costs incurred during Storm Uri over nine months through December 2021 with no financing charge.
MichiganIn May, the Michigan Public Service Commission approved recovery of $2 million in natural gas costs over 10 months with no financing charge.
Supply Chain and Capital Expenditures
NSP-Wisconsin’s ability to meet customer energy requirements, respond to storm-related disruptions and execute our capital expenditure program are dependent on maintaining an efficient supply chain. Overall, as a result of COVID-19, manufacturing processes have experienced disruptions related to scarcity of raw materials and interruptions in production and shipping. These disruptions have been further exacerbated by inflationary pressures, storms and labor shortages. The Company continues to monitor the availability of materials and seek alternative suppliers as necessary.
Public Utility Regulation
The FERC and various state and local regulatory commissions regulate NSP-Wisconsin. The electric and natural gas rates charged to customers of NSP-Wisconsin are approved by the FERC or the regulatory commissions in the states in which it operates.
The ratesRates are designed to recover plant investment, operating costs and an allowed return on investment. NSP-Wisconsin requests changes in utility rates for utility services through filings with governing commissions.commission filings.
Changes in operating costs can affect NSP-Wisconsin’s financial results, depending on the timing of rate case filings and implementation of final rates. Other factors affecting rate filings are new investments, sales, conservation and demand side management efforts, and the cost of capital. In addition, the regulatory commissions authorize the ROE, capital structure and depreciation rates in rate proceedings. Decisions by these regulators can significantly impact NSP-Wisconsin’s results of operations.
Except to the extent noted below, the circumstances set forth in Public Utility Regulation included in Item 7 of NSP-Wisconsin’s Annual Report on Form 10-K10-K for the year ended Dec. 31, 20192020 and in Item 2 of NSP-Wisconsin’sNSP-Wisconsin's Quarterly Report on Form 10-Q for the quarterly period ended March 31, 20202021 appropriately represent, in all material respects, the current status of public utility regulation and are incorporated herein by reference.
NSP-Wisconsin Solar Proposal In June 2021, the PSCW approved NSP-Wisconsin’s request to purchase the 74 MW Western Mustang build-own-transfer solar facility for approximately $100 million. The project is scheduled to go into service in 2023.
NSP-Wisconsin Electric and Natural Gas Settlement — In July 2021, NSP-Wisconsin filed an application with the PSCW seeking approval of a rate case settlement with various intervenors for 2022-2023.
The settlement agreement increases electric rates by $35 million (4.9%) for 2022 and an incremental $18 million increase (2.5%) for 2023. For the natural gas utility, rates increase by $10 million (8.4%) for 2022 and an incremental $3 million (2.3%) increase for 2023.
Key elements of the settlement include:
ROE of 9.80% for 2022 and 10.00% for 2023.
Equity ratio of 52.5% for both 2022 and 2023.
Returning $9 million in various net regulatory liabilities to offset customer impacts in 2023.
14

Table of Contents

2019 Electric Fuel Cost Recovery Deferring certain pension and other post-employment benefit expense in 2021 through 2023.
Addressing COVID-19 deferral recovery in the next rate case proceeding.
NSP-Wisconsin’s electric fuel costs for 2019 were lower than authorizedDeferring potential changes in rates and outside the 2% annual tolerance band, primarilytax expenses due to increased sales to other utilities compared to the forecast used to set authorized rates. Under the fuel cost recovery rules, NSP-Wisconsin may retain approximately $3.4 million of fuel costs and defer the amount of over-recoverychanges in excess of the 2% annual tolerance band for future refund to customers. In March 2020, NSP-Wisconsin filed with the PSCW indicating over-collections of approximately $9.7 million to customers and proposed for refunds to be issuedfederal or state tax law in September 2020.2021 through 2023.
2021 Electric Fuel Cost Recovery In June 2020, NSP-Wisconsin filedIncorporating an application with the PSCW to update its 2021 fuel costsearnings sharing mechanism for 2022 and return biomass fuel savings, which would decrease retail electric rates for 2021 by approximately $13.9 million. The PSCW will decide on the application later in 2020.2023.
Request to Participate in UMP— In June 2020, NSP-Wisconsin withdrew its request to temporarily participateA PSCW decision is anticipated in the UMP originally filed in April 2020 due to the public health emergency. Instead, NSP-Wisconsin submitted its formal application to the PSCW to permanently participate in the UMP in July 2020. NSP-Wisconsin expects a Commission decision later in 2020. fourth quarter of 2021.
Environmental
Environmental RegulationAffordable Clean Energy
In July 2019, the EPA adopted the Affordable Clean Energy rule, which requires states to develop plans by 2022 for greenhouse gas reductions from coal-fired power plants. The state plans, due toIn January 2021, the U.S. Court of Appeals for the D.C. Circuit issued a decision vacating and remanding the Affordable Clean Energy rule. That decision, if not successfully appealed or reconsidered, would allow the EPA in July 2022, will evaluate and potentiallyto proceed with alternate regulation of coal-fired power plants. If the new rules require heat rate improvements at existing coal-fired plants. It is not yet known how these state plans will affect our existing coal plants, but they could require substantial additional investment, even in plants slated for retirement. NSP-Wisconsin believes, based on prior state commission practice,practices, that the cost of these initiatives or replacement generation would be recoverable through rates.
Emerging Regulation
New regulations and legislation are being considered to regulate PFAS in drinking water, water discharges, commercial products, wastes, and other areas. PFAS are man-made chemicals found in many consumer products that can persist and accumulate in the environment. These chemicals have received heightened attention by environmental regulators. Increased regulation of PFAS and other emerging contaminants at the federal, state, and local level could have a potential adverse effect on our operations but at this time, it is uncertain what impact, if any, there will be on our results of operations, financial condition or cash flows. NSP-Wisconsin will continue to monitor these regulatory developments and their potential impact on its operations
ITEM 4 — CONTROLS AND PROCEDURES
Disclosure Controls and Procedures
NSP-Wisconsin maintains a set of disclosure controls and procedures designed to ensure that information required to be disclosed in reports that it files or submits under the Securities Exchange Act of 1934 is recorded, processed, summarized, and reported within the time periods specified in SEC rules and forms.
In addition, the disclosure controls and procedures ensure that information required to be disclosed is accumulated and communicated to management, including the CEO and CFO, allowing timely decisions regarding required disclosure.
As of June 30, 2020,2021, based on an evaluation carried out under the supervision and with the participation of NSP-Wisconsin’s management, including the CEO and CFO, of the effectiveness of its disclosure controls and the procedures, the CEO and CFO have concluded that NSP-Wisconsin’s disclosure controls and procedures were effective.

Internal Control Over Financial Reporting
No changes in NSP-Wisconsin’s internal control over financial reporting occurred during the most recent fiscal quarter that materially affected, or are reasonably likely to materially affect, NSP-Wisconsin’s internal control over financial reporting.
PART II — OTHER INFORMATION
ITEM 1 — LEGAL PROCEEDINGS
NSP-Wisconsin is involved in various litigation matters in the ordinary course of business. The assessment of whether a loss is probable or is a reasonable possibility, and whether the loss or a range of loss is estimable, often involves a series of complex judgments about future events. Management maintains accruals for losses probable of being incurred and subject to reasonable estimation. Management is sometimes unable to estimate an amount or range of a reasonably possible loss in certain situations, including but not limited to, when (1) the damages sought are indeterminate, (2) the proceedings are in the early stages, or (3) the matters involve novel or unsettled legal theories.
In such cases, there is considerable uncertainty regarding the timing or ultimate resolution of such matters, including a possible eventual loss. For current proceedings not specifically reported herein, management does not anticipate that the ultimate liabilities, if any, would have a material effect on NSP-Wisconsin’s consolidated financial statements. Unless otherwise required by GAAP, legalLegal fees are generally expensed as incurred.
See Note 9 to the consolidated financial statements and Part I Item 2 for further information.
ITEM 1A — RISK FACTORS
There have been no material changes from the risk factors disclosed in our Form 10-K for the year ended Dec. 31, 2019 except as follows:
We face risks related to health epidemics and other outbreaks, which may have a material effect on our financial condition, results of operations and cash flows.
The global outbreak of COVID-19 is currently impacting countries, communities, supply chains and markets. A high degree of uncertainty continues to exist regarding COVID-19, the duration and magnitude of business restrictions, re-shut downs, if any, and the level and pace of economic recovery. While we are implementing contingency plans, there are no guarantees these plans will be sufficient to offset the impact of COVID-19.
We cannot ultimately predict whether it will have a material impact on our liquidity, financial condition, or results of operations. Nor can we predict the impact of the virus on the health of our employees, our supply chain or our ability to recover higher costs associated with managing through the pandemic.
NSP-Wisconsin's risk factors are documented in Item 1A of Part I of its Annual Report on Form 10-K for the year ended Dec. 31, 2019,2020, which is incorporated herein by reference, as well as other information set forthreference. There have been no material changes from the risk factors previously disclosed in this report, which could have a material impact on our financial condition, results of operations and cash flows.the Form 10-K.
15

Table of Contents

ITEM 6 — EXHIBITS
* Indicates incorporation by reference
Exhibit NumberDescriptionReport or Registration StatementSEC File or Registration NumberExhibit Reference
NSP-Wisconsin Form S-4 dated Jan. 21, 2004333-1120333.01
NSP-Wisconsin Form 10-K for the year ended Dec. 31, 2018001-031403.02
NSP-Wisconsin 8-K dated May 26, 2020001-031404.01
101.INSInline XBRL Instance Document - the instance document does not appear in the Interactive Data File because its XBRL tags are embedded within the Inline XBRL document.
101.SCHInline XBRL Schema
101.CALInline XBRL Calculation
101.DEFInline XBRL Definition
101.LABInline XBRL Label
101.PREInline XBRL Presentation
104Cover Page Interactive Data File (formatted as Inline XBRL and contained in Exhibit 101)
16

Table of Contents

SIGNATURES
Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.
Northern States Power Company (a Wisconsin corporation)
July 31, 202029, 2021By:/s/ JEFFREY S. SAVAGE
Jeffrey S. Savage
Senior Vice President, Controller
(Principal Accounting Officer)
/s/ BRIAN J. VAN ABEL
Brian J. Van Abel
Executive Vice President, Chief Financial Officer and Director
(Principal Financial Officer)
17